BCBC M-55A Engine Oil Pump

Engine Oil Pump Overview

This Melling engine oil pump, part number M-55A, is a standard replacement pump built for Chevrolet performance and stock applications. It is engineered for consistent oil pressure and efficient operation in classic small- and big-block engine builds.

Key Features

• Standard replacement engine oil pump with gear and gerotor technology
• Steel gears and cast iron housing for durable construction
• Spur gear design with standard pressure and standard volume output
• Precision-ground end plates for improved wear resistance
• Individually tested for pressure and flow under operating conditions
• Made in the USA

Detailed Description

The M-55A oil pump is designed around close-tolerance machining to help maintain proper engine pressure and efficient pump operation. Its cast iron housing and cover, steel gears, and precision-ground end plates reflect a build focused on consistent lubrication performance. This part number M-55A is a direct fit for a wide range of Chevrolet applications, including Camaro, Corvette, Chevelle, Nova, and Impala models listed with high performance engine or stock notes.

Melling’s Stock line focuses on dependable replacement components for engine lubrication systems. For buyers restoring or maintaining a Chevrolet Camaro, Chevrolet Chevelle, or Chevrolet Nova, the M-55A offers a practical replacement option with standard pressure and standard volume characteristics.

What It Is Used For

• Low oil pressure caused by a worn or inefficient pump
• Inconsistent oil delivery in a rebuilt or restored engine
• Excessive wear from aging pump gears or cover surfaces
• Replacement during engine service on stock or performance builds
• Restoring proper lubrication in classic Chevrolet engines

Installation Notes and Tips

Verify engine application, pickup tube diameter, and mounting hole dimensions before installation. This pump uses a drive shaft design and does not include a gasket or seal, drive shaft, bolts, or pickup screen. Confirm compatibility with the engine’s oiling system and prime the pump before startup.

Quality Assurance

Melling manufactures this oil pump in the USA and tests each unit for pressure and flow to match operating conditions. The M-55A is built to production standards using quality materials for dependable service in the applications listed.